Annual Examinations For Secondary Schools Worksheets - Department For Curriculum Management And Elearning Page 10
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1160N
8.
This
question
is
Block
about pressure
(a)
A force of 60 N is
applied on a small
piston of a hydraulic
Large piston
jack of area 0.3 m
2
as
Small piston
shown in Diagram 11.
Liquid
The area of the larger
piston is 3 m
2
.
Diagram 11
(i)
Which liquid is normally used in a hydraulic jack?
________________________
(1)
(ii)
Name one property of liquid used in a hydraulic jack.
________________________________________________________________________________
(1)
F
(iii)
Using the formula P =
, calculate the pressure exerted by the 60 N force at the
A
small piston.
________________________________________________________________________________
________________________________________________________________________________
(2)
(iv)
What is the pressure exerted on the large piston?
________________________________________________________________________________
(1)
(v)
Using your answer in a(iv), calculate the force exerted on the block.
________________________________________________________________________________
(2)
(b)
In 1662, the chemist and physicist Robert Boyle published a law on pressure
and volume. In an experiment to verify the relationship between pressure and
volume, the following results were obtained.
Pressure (kPa)
100
200
250
400
500
3
Volume (cm )
10
5
4
2.5
2
3
1/Volume (1/cm
)
0.10
0.20
0.25
0.40
0.5
(i)
Plot a graph of Pressure on the y-axis against 1/Volume
on the x-axis.
(5)
(ii)
From your graph or otherwise, what is the value of:
-3
• the pressure when 1/Volume is 0.15 cm ?
(1)
Page 10 of 11
Physics – Secondary Schools – Track 2 – Form 3 – 2011
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